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Finding the Fourth Proportional to 660,422.20, 990,633.30 and 344,805.70

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Solution

The fourth proportional to 660,422.20, 990,633.30 and 344,805.70 is: 517,208.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,422.20 : 990,633.30 = 344,805.70 : x
  2. Step 2: Convert to fraction form
    660,422.20/990,633.30 = 344,805.70/x
  3. Step 3: Cross multiply
    660,422.20x = 990,633.30 × 344,805.70
  4. Step 4: Simplify right side
    660,422.20x = 341,576,008,449.81
  5. Step 5: Solve for x
    x = 341,576,008,449.81/660,422.20
  6. Step 6: Final answer
    x = 517,208.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.